Cover of the textbook Cutting Edge Intermediate - Student's Book

The key answer of exercise Grammar

The key to exercise solutions in chapter 11 - Language focus 2 for the textbook Cutting Edge Intermediate - Student's Book with authors Sarah Cunningham, Peter Moor and Jonathan Bygrave from Pearson Education

Question

Write the past forms of the following verbs, where possible. Which three verbs do not have past forms? Which form is used instead?

Answer

  1. could
  2. was / were allowed to
  3. wasn't / weren't allowed to
  4. couldn't
  5. didn't have to
  6. had to
  7. no past form: had to
  8. no past form: weren't allowed to / couldn't
  9. had to

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